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Guide to Good Practice in Commissioning Accessible Websites

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Guide to Good Practice in Commissioning Accessible Websites PUBLICLY AVAILABLE SPECIFICATION PAS 78:2006 Guide to good practice in commissioning accessible websites ICS 35.240.30 PAS 78:2006 This Publicly Available Specification comes into effect on 8 March 2006 Amendments issued since publication Amd. No. Date Comments © BSI 8 March 2006 ISBN 0 580 46567 5 PAS 78:2006 Contents Page Foreword ii Introduction 1 1Scope 5 2 Normative references 5 3 Terms and definitions 5 4 General principles 11 4.1 Development of an accessibility policy 11 4.2 Upholding W3C guidelines and specifications 11 4.2.1 General 11 4.2.2 Content formats 11 4.2.3 Authoring tools 11 4.3 Conformance checking 12 4.4 Involving disabled people in the requirements gathering and conceptual design process 12 4.5 Regular testing by disabled people 12 4.6 Additional accessibility provisions 12 5 How disabled people use websites 13 5.1 General 13 5.2 Operating systems 13 5.3 Access technology and other considerations for blind and partially sighted people 14 5.4 Access technology and other considerations for deaf and hard of hearing people 15 5.5 Access technology and other considerations for people with learning disabilities 15 5.6 Access technology and other considerations for people with cognitive impairments (eg dyslexia) 16 5.7 Access technology and other considerations for people with motor impairments 16 6 Defining the accessibility policy for the website 17 6.1 General 17 6.2 Content of the accessibility policy 17 6.3 Publicly available accessibility policy statement 19 6.4 Accessibility guidelines 19 © BSI 8 March 2006 i PAS 78:2006 7 Web technologies 21 7.1 Common web technologies 21 7.2 Structural languages 22 7.3 Style sheets eg CSS 22 7.4 Client side scripting and programming languages eg JavaScript and Java 23 7.4.1 Object models 23 7.5 Plug-in rich media formats 23 7.5.1 General 23 7.5.2 Portable Document Format (PDF) 24 7.5.3 Flash 24 7.5.4 Audio-video content 25 7.6 Visual-orientated anti-robot tests 26 8 Accessibility testing and maintenance 26 8.1 General 26 8.2 Creating a test plan 28 8.3 Determining technical accessibility 28 8.3.1 Automated testing 28 8.3.2 Validation 29 8.3.3 Testing with assistive technology 29 8.4 Determining usable accessibility 29 8.4.1 Expert review 30 8.4.2 Conformance inspection 30 8.4.3 User testing 31 8.4.3.1 Why is user testing necessary? 31 8.4.3.2 User testing methods 31 8.4.3.3 Budgetary considerations 32 8.4.3.3.1 Sample sizes 32 8.4.3.3.2 User recruitment 32 8.4.3.3.3 Using specialized evaluators 32 8.5 Maintaining accessibility 33 9 Contracting web design and accessibility auditing services 34 9.1 Choosing a website developer 34 9.2 Agencies providing web accessibility consultancy 35 ii © BSI 8 March 2006 PAS 78:2006 Annex A (informative) Suggested user profiles include: 36 Annex B (informative) Possible criteria for determining success 37 Annex C (informative) Suggested questions for suppliers 38 Annex D (informative) Accreditation 40 Annex E (informative) Various references 41 Annex F (informative) Contracting usability testing services 44 Annex G (informative) How to select a CMS system 45 Bibliography 47 Standards 56 Useful websites 56 Relevant publications 57 Index 50 © BSI 8 March 2006 iii PAS 78:2006 Foreword This Publicly Available Specification (PAS) has been developed by the Disability Rights Commission (DRC) in collaboration with the British Standards Institution (BSI). No copying without permission of BSI except as permitted by copyright law. Acknowledgement is given to the following organizations that were consulted in the development of this specification. Abilitynet British Broadcasting Corporation (BBC) Cabinet Office (e-Government Unit) Cxpartners (representing the Usability Professionals Association) IBM RNIB (Royal National Institute of the Blind) Tesco.com University College London Usability Professionals Association (UPA) Wider comments from other interested parties were invited by BSI. The expert contributions made by the organizations and individuals consulted in the development of this Publicly Available Specification are gratefully acknowledged. Please note that during the production of this PAS Macromedia was bought by Adobe and all resources regarding Flash accessibility will eventually be available at access.adobe.com. This Publicly Available Specification does not replace, contradict or supplement any of the World Wide Web Consortium (W3C) guidelines or specifications. This PAS is vendor neutral and product neutral. Generic terms are used in preference to brand names to ensure impartiality. iv © BSI 8 March 2006 PAS 78:2006 Summary of pages This document comprises a front cover, an inside front cover, pages i to v, a blank page, pages 1 to 56, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. This Publicly Available Specification does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. This Publicly Available Specification has been prepared and published by BSI, which retains its ownership and copyright. BSI reserves the right to withdraw or amend this Publicly Available Specification on receipt of authoritative advice that it is appropriate to do so. This Publicly Available Specification will be reviewed at intervals not exceeding two years, and any amendments arising from the review will be published as an amended Publicly Available Specification and publicised in Update Standards. Compliance with this Publicly Available Specification does not of itself confer immunity from legal obligations. This Publicly Available Specification is not to be regarded as a British Standard. © BSI 8 March 2006 v blank PAS 78:2006 Introduction Why make your website accessible to disabled people? The introduction of the Disability Discrimination Act 1995 (DDA) [1] is only one reason why it is in the interest of website commissioners to develop accessible websites. Accessible websites also have the potential to widen a website’s current audience and reach new ones: • The Family Resources Survey [2] found that there are almost 10 million disabled people in the UK with a combined spending power in the region of 80 billion pounds per annum. Furthermore there are millions of other individuals that are affected by sensory, physical and/or cognitive impairments, including those resulting from the ageing process. • Research undertaken by the DRC “The Web: Access and inclusion for disabled people” [3] has confirmed that people without disabilities are also able to use websites that are optimized for accessibility more effectively and more successfully. • Content developed upholding World Wide Web Consortium (W3C) guidelines and specifications can be more easily transferred to other media, such as interactive TV, mobile phones and handheld computers. • Accessible content, for example where a text equivalent is provided for graphical elements, is highly visible to search engines, often leading to higher rankings. Ensuring accessibility can also be a source of good publicity, as social inclusion results in a fairer world with equality of opportunity. Further business benefits achieved by making websites accessible are given at http://www.w3.org/WAI/bcase/benefits.html. The main focus of this document is the commissioning of public-facing (internet) websites but the principles can also be used by commissioners of intranet or extranet websites. It is important to note that not all web developers will have practical accessibility design experience and/or accessibility expertise; see Clause 9 for advice on how to find suitable web developers. © BSI 8 March 2006 1 PAS 78:2006 The Disability Discrimination Act 1995 (DDA) The DDA and the secondary legislation applied within Northern Ireland have placed a legal duty on service providers to make reasonable adjustments to the way they provide services to ensure that disabled people can use them. The DDA states that disabled people should not be treated less favourably than other people when accessing services. This duty extends to the provision of websites where a website falls within the definition of a service under the terms of the DDA. For the purposes of this document, website commissioners are assumed to have responsibility for this duty. It is not possible to provide a definitive specification for a fully accessible website which will satisfy the requirements of the DDA, however the guidance set out in this Publicly Available Specification represents what the Disability Rights Commission (DRC) believes to be good practice. The Disability Rights Commission (DRC) The DRC is an independent body established in April 2000 by an Act of Parliament to stop discrimination and promote equality of opportunity for disabled people. The DRC’s goal is “a society where all disabled people can participate fully as equal citizens”. In 2002, the DRC published a Code of Practice entitled “Rights of Access — Goods, Facilities, Services and Premises” [4] to accompany Part 3 of the DDA. The Code makes explicit reference to websites as “services” in accordance with the DDA’s definition of the term. At the time of publication the DRC were updating the Part 3 Code of Practice. The DRC Formal Investigation into website accessibility In April 2004, the DRC published the report of their Formal Investigation into web accessibility in the UK. One significant finding was that 81 per cent of websites surveyed failed to uphold the most basic W3C accessibility guidelines and specifications, even though many website commissioners and developers claimed to be aware of the importance of making websites accessible. 2 © BSI 8 March 2006 PAS 78:2006 The DRC has concluded that there is a need for best practice guidance on the process of commissioning accessible websites.
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